Question

Difference between heat and Temperature

Answer 1

Heat:

• It is a form of internal energy* obtained because of the random motion and the attractive force of molecules within the substance.
• Its SI unit is joule.
• The amount of heat energy contained in a body depends on its mass, temperature and material (specific heat capacity).
• It can be measured using the principle of calorimetry (or principle of method of mixtures).
• Two bodies that have the same amount of heat energy can differ in their temperature.
• When two bodies are in contact, the total amount of heat energy is the sum of the heat energy of each body.

Temperature:

• It is a quantity that determine which direction the heat energy will flow in.
• Its SI unit is kelvin.
• The temperature of a body depends on the average kinetic energy of its molecules.
• It is measured using a thermometer.
• Two bodies at the same temperature can contain different amounts of heat energy.
• If two bodies at different temperatures are kept in contact, the resultant temperature will be the temperature between the two temperatures.

*Internal energy is the sum of potential and kinetic energies of a body.

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